Thanks to everyone for the Carrion Crow comments and reactions. I'm uploading this Blackcap while my laptop still works after a fashion - after each upload, it freezes (the computer, not the bird), has to be forcibly shut down, and restarted. But enough of that!
The Blackcap still warbles loudly and melodiously all day, as it's done since 6 March, right up until nightfall.
Thank you for your comments on my pictures, stay safe and well, and good birding!
John